Programmable logic controller



FIG. 1 is a top, front and right side perspective view of programmable logic controller showing my new design; and,

FIG. 2 is a top, front and left side perspective view thereof.

The structure shown in phantom lines in FIGS. 1 and 2 is for illustrative purposes only and forms no part of the claim design. 

The ornamental design for a programmable logic controller, as shown and described. 